Nahlia, Nurul Laili, and Lita Setyowatie. “Overlapping Primary and Secondary Syphilis in Human Immunodeficiency Virus (HIV) Patient”. Qanun Medika - Medical Journal Faculty of Medicine Muhammadiyah Surabaya, vol. 4, no. 2, July 2020, pp. 265-72, doi:10.30651/jqm.v4i2.4378.